-LRB- CNN -RRB- -- Army Sgt. Bowe Bergdahl is `` just about done '' with the final phase of his reintegration , a military source with access to information on Bergdahl 's care told CNN .

He is expected to be assigned shortly to a new Army unit , the official said . Any issue of leave would be up to that unit .

Bergdahl , the U.S. soldier held captive for five years by militants before his release in May , has ventured several times off an Army base in Texas as part of the effort to get him used to everyday life in America , a military spokeswoman has said .

His release on May 31 in exchange for five Taliban being held by the U.S. military has rankled some , including former members of his unit , who said he was a deserter who endangered colleagues searching for him .

Yet while investigating circumstances surrounding his departure , the military has also said it 's focused on making sure Bergdahl gets better mentally and physically , so he can gradually readjust to normal life .

Since being freed , Bergdahl has been carefully monitored at a military hospital in Landstuhl , Germany , and at his military home since June 13 , Joint Base San Antonio-Fort Sam Houston .

He recently transitioned from inpatient care at Brooke Army Medical Center in Texas to outpatient care , the Army said on June 22 .

Still , Bergdahl has hardly left the care of military health professionals .

Members of his reintegration team escort him whenever he leaves base and interacts with the public , the Army spokeswoman said . His stops have included restaurants , a library , a supermarket and several stores of his choosing .

Bergdahl went missing on June 30 , 2009 , in Afghanistan 's Paktika province , where he was deployed with the 1st Battalion , 501st Infantry Regiment , 4th Brigade Combat Team , 25th Infantry Division .

An Army fact-finding investigation conducted in the months after his disappearance concluded he left his outpost deliberately and of his own free will , according to an official who was briefed on the report .

But there was no definitive conclusion Bergdahl was a deserter because that would require knowing his intent , something officials could n't learn without talking to him , a U.S. military official has said .

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Army general to start investigating how , why Bergdahl left base

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Bowe Bergdahl is expected to be assigned shortly to a new Army unit

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He is now in outpatient care

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Bergdahl was released in exchange for five Taliban being held by the U.S.